/* 糖心vlog - 主样式文件 | shwcrgs.cn */
/* ============================================
   CSS变量与全局重置
   ============================================ */
:root {
    --primary: #e8436a;
    --primary-dark: #c42d52;
    --primary-light: #ff6b8a;
    --secondary: #ff9a3c;
    --accent: #7c4dff;
    --accent-light: #b39ddb;
    --bg-dark: #0d0d1a;
    --bg-card: #16162a;
    --bg-card2: #1e1e35;
    --text-primary: #f0f0f8;
    --text-secondary: #a0a0c0;
    --text-muted: #6060a0;
    --border: rgba(255,255,255,0.08);
    --gradient-primary: linear-gradient(135deg, #e8436a 0%, #ff9a3c 100%);
    --gradient-hero: linear-gradient(135deg, #0d0d1a 0%, #1a0a2e 50%, #0d1a2e 100%);
    --shadow-card: 0 8px 32px rgba(0,0,0,0.4);
    --shadow-hover: 0 16px 48px rgba(232,67,106,0.3);
    --radius: 12px;
    --radius-lg: 20px;
    --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
    --font-main: 'PingFang SC','Microsoft YaHei','Hiragino Sans GB',sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
    font-family: var(--font-main);
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
}
a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary); }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: var(--font-main); }

/* ============================================
   容器与布局
   ============================================ */
.container { max-width: 1280px; margin: 0 auto; padding: 0 20px; }
.section { padding: 80px 0; }
.section-sm { padding: 50px 0; }

/* ============================================
   头部导航
   ============================================ */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(13,13,26,0.97);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}
.header-top { padding: 0; }
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    gap: 20px;
}
.logo-wrap a {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-primary);
}
.site-logo { width: 40px; height: 40px; border-radius: 8px; object-fit: cover; }
.logo-text {
    font-size: 1.4rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    color: #fff;
}
.logo-text em {
    font-style: normal;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.main-nav { flex: 1; }
.nav-list {
    display: flex;
    align-items: center;
    gap: 4px;
    justify-content: center;
}
.nav-item a {
    display: block;
    padding: 6px 14px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: 8px;
    transition: var(--transition);
    white-space: nowrap;
}
.nav-item a:hover,
.nav-item.active a {
    color: #fff;
    background: rgba(232,67,106,0.15);
}
.nav-item.active a { color: var(--primary-light); }
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
}
.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

/* ============================================
   搜索框
   ============================================ */
.search-bar-wrap {
    background: rgba(22,22,42,0.9);
    border-top: 1px solid var(--border);
    padding: 10px 0;
}
.search-form { width: 100%; }
.search-inner {
    display: flex;
    align-items: center;
    background: var(--bg-card2);
    border: 1px solid var(--border);
    border-radius: 50px;
    overflow: hidden;
    max-width: 700px;
    margin: 0 auto;
    transition: var(--transition);
}
.search-inner:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(232,67,106,0.15);
}
.search-input {
    flex: 1;
    background: none;
    border: none;
    outline: none;
    padding: 10px 20px;
    color: var(--text-primary);
    font-size: 0.95rem;
    font-family: var(--font-main);
}
.search-input::placeholder { color: var(--text-muted); }
.search-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 10px 24px;
    background: var(--gradient-primary);
    color: #fff;
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: 0 50px 50px 0;
    transition: var(--transition);
}
.search-btn:hover { opacity: 0.9; }

/* ============================================
   Hero 横幅
   ============================================ */
.hero-section {
    position: relative;
    min-height: 600px;
    display: flex;
    align-items: center;
    overflow: hidden;
    background: var(--gradient-hero);
}
.hero-bg {
    position: absolute;
    inset: 0;
    background-image: url('/images/hero_banner.jpg');
    background-size: cover;
    background-position: center;
    opacity: 0.25;
    filter: blur(2px);
}
.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(13,13,26,0.9) 0%, rgba(26,10,46,0.7) 100%);
}
.hero-content {
    position: relative;
    z-index: 2;
    max-width: 700px;
}
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(232,67,106,0.15);
    border: 1px solid rgba(232,67,106,0.3);
    color: var(--primary-light);
    padding: 6px 16px;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 20px;
}
.hero-badge::before {
    content: '';
    width: 8px;
    height: 8px;
    background: var(--primary);
    border-radius: 50%;
    animation: pulse 2s infinite;
}
@keyframes pulse {
    0%,100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.3); }
}
.hero-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: 20px;
    color: #fff;
}
.hero-title .highlight {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero-desc {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
    line-height: 1.8;
}
.hero-btns {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    background: var(--gradient-primary);
    color: #fff;
    font-size: 1rem;
    font-weight: 700;
    border-radius: 50px;
    transition: var(--transition);
    box-shadow: 0 4px 20px rgba(232,67,106,0.4);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(232,67,106,0.5);
    color: #fff;
}
.btn-outline {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border: 2px solid rgba(255,255,255,0.2);
    color: #fff;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 50px;
    transition: var(--transition);
}
.btn-outline:hover {
    border-color: var(--primary);
    background: rgba(232,67,106,0.1);
    color: var(--primary-light);
}
.hero-stats {
    position: relative;
    z-index: 2;
    display: flex;
    gap: 40px;
    margin-top: 50px;
}
.stat-item { text-align: center; }
.stat-num {
    font-size: 2rem;
    font-weight: 900;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.stat-label { font-size: 0.85rem; color: var(--text-muted); margin-top: 4px; }

/* ============================================
   区块标题
   ============================================ */
.section-header { text-align: center; margin-bottom: 50px; }
.section-tag {
    display: inline-block;
    background: rgba(232,67,106,0.12);
    color: var(--primary-light);
    padding: 4px 16px;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 12px;
}
.section-title {
    font-size: clamp(1.6rem, 3vw, 2.4rem);
    font-weight: 800;
    color: #fff;
    margin-bottom: 12px;
}
.section-title .accent {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.section-sub {
    font-size: 1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ============================================
   视频卡片
   ============================================ */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}
.video-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border);
    transition: var(--transition);
    cursor: pointer;
}
.video-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
    border-color: rgba(232,67,106,0.3);
}
.video-thumb {
    position: relative;
    aspect-ratio: 16/9;
    overflow: hidden;
    background: var(--bg-card2);
}
.video-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}
.video-card:hover .video-thumb img { transform: scale(1.05); }
.play-btn {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0,0,0,0.3);
    opacity: 0;
    transition: var(--transition);
}
.video-card:hover .play-btn { opacity: 1; }
.play-icon {
    width: 60px;
    height: 60px;
    background: rgba(232,67,106,0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(4px);
    transform: scale(0.8);
    transition: var(--transition);
}
.video-card:hover .play-icon { transform: scale(1); }
.play-icon svg { width: 24px; height: 24px; fill: #fff; margin-left: 4px; }
.video-duration {
    position: absolute;
    bottom: 8px;
    right: 8px;
    background: rgba(0,0,0,0.8);
    color: #fff;
    font-size: 0.75rem;
    padding: 2px 8px;
    border-radius: 4px;
}
.video-tag {
    position: absolute;
    top: 8px;
    left: 8px;
    background: var(--primary);
    color: #fff;
    font-size: 0.7rem;
    font-weight: 700;
    padding: 3px 10px;
    border-radius: 4px;
}
.video-info { padding: 16px; }
.video-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.video-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.8rem;
    color: var(--text-muted);
}
.video-meta span { display: flex; align-items: center; gap: 4px; }
.video-stats {
    display: flex;
    gap: 16px;
    margin-top: 8px;
    font-size: 0.8rem;
    color: var(--text-muted);
}
.video-stats .views::before { content: '▶ '; }
.video-stats .likes::before { content: '♥ '; color: var(--primary); }
.video-stats .comments::before { content: '💬 '; }

/* ============================================
   功能模块卡片
   ============================================ */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 24px;
}
.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px 24px;
    text-align: center;
    transition: var(--transition);
}
.feature-card:hover {
    transform: translateY(-4px);
    border-color: rgba(232,67,106,0.3);
    box-shadow: var(--shadow-card);
}
.feature-icon {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 2rem;
}
.feature-icon.pink { background: rgba(232,67,106,0.15); }
.feature-icon.orange { background: rgba(255,154,60,0.15); }
.feature-icon.purple { background: rgba(124,77,255,0.15); }
.feature-icon.blue { background: rgba(33,150,243,0.15); }
.feature-icon.green { background: rgba(76,175,80,0.15); }
.feature-icon.teal { background: rgba(0,188,212,0.15); }
.feature-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 10px;
}
.feature-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ============================================
   专家展示
   ============================================ */
.expert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 24px;
}
.expert-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
    text-align: center;
}
.expert-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}
.expert-avatar {
    width: 100%;
    aspect-ratio: 3/4;
    object-fit: cover;
    object-position: top;
}
.expert-info { padding: 20px; }
.expert-name {
    font-size: 1.1rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 4px;
}
.expert-role {
    font-size: 0.85rem;
    color: var(--primary-light);
    margin-bottom: 10px;
}
.expert-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 16px;
}
.expert-awards {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    justify-content: center;
    margin-bottom: 16px;
}
.award-tag {
    background: rgba(232,67,106,0.1);
    border: 1px solid rgba(232,67,106,0.2);
    color: var(--primary-light);
    font-size: 0.75rem;
    padding: 3px 10px;
    border-radius: 50px;
}
.expert-btns {
    display: flex;
    gap: 8px;
    justify-content: center;
}
.btn-sm {
    padding: 7px 16px;
    border-radius: 8px;
    font-size: 0.8rem;
    font-weight: 600;
    transition: var(--transition);
}
.btn-sm.primary {
    background: var(--gradient-primary);
    color: #fff;
}
.btn-sm.outline {
    border: 1px solid var(--border);
    color: var(--text-secondary);
}
.btn-sm.outline:hover {
    border-color: var(--primary);
    color: var(--primary-light);
}

/* ============================================
   合作品牌Logo墙
   ============================================ */
.partner-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: center;
    align-items: center;
}
.partner-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px 28px;
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-secondary);
    transition: var(--transition);
    min-width: 120px;
    text-align: center;
}
.partner-item:hover {
    border-color: var(--primary);
    color: var(--primary-light);
    background: rgba(232,67,106,0.05);
}

/* ============================================
   FAQ
   ============================================ */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 12px;
    overflow: hidden;
    transition: var(--transition);
}
.faq-item.open { border-color: rgba(232,67,106,0.3); }
.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    gap: 16px;
}
.faq-question:hover { color: var(--primary-light); }
.faq-arrow {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: rgba(232,67,106,0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: var(--transition);
    color: var(--primary-light);
    font-size: 1.2rem;
    line-height: 1;
}
.faq-item.open .faq-arrow { transform: rotate(45deg); background: var(--primary); color: #fff; }
.faq-answer {
    display: none;
    padding: 0 24px 20px;
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.8;
}
.faq-item.open .faq-answer { display: block; }

/* ============================================
   用户评价
   ============================================ */
.review-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}
.review-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    transition: var(--transition);
}
.review-card:hover {
    border-color: rgba(232,67,106,0.2);
    transform: translateY(-2px);
}
.review-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 14px;
}
.review-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    font-weight: 700;
    color: #fff;
    flex-shrink: 0;
}
.review-name {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
}
.review-date {
    font-size: 0.8rem;
    color: var(--text-muted);
}
.review-stars { color: #ffd700; font-size: 0.9rem; margin-bottom: 10px; }
.review-text {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
}
.review-tag {
    display: inline-block;
    background: rgba(232,67,106,0.08);
    color: var(--primary-light);
    font-size: 0.75rem;
    padding: 3px 10px;
    border-radius: 50px;
    margin-top: 12px;
}

/* ============================================
   社区功能区
   ============================================ */
.community-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
}
.community-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px 20px;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
}
.community-card:hover {
    transform: translateY(-4px);
    border-color: rgba(232,67,106,0.3);
    box-shadow: var(--shadow-card);
}
.community-icon { font-size: 2.5rem; margin-bottom: 12px; }
.community-name {
    font-size: 1rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 6px;
}
.community-count {
    font-size: 0.85rem;
    color: var(--primary-light);
    font-weight: 600;
}

/* ============================================
   图片展示区
   ============================================ */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
}
.gallery-item {
    border-radius: var(--radius);
    overflow: hidden;
    aspect-ratio: 3/4;
    position: relative;
    cursor: pointer;
}
.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}
.gallery-item:hover img { transform: scale(1.08); }
.gallery-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.7) 0%, transparent 60%);
    opacity: 0;
    transition: var(--transition);
    display: flex;
    align-items: flex-end;
    padding: 16px;
}
.gallery-item:hover .gallery-overlay { opacity: 1; }
.gallery-label {
    font-size: 0.85rem;
    color: #fff;
    font-weight: 600;
}

/* ============================================
   How-To 加入社区
   ============================================ */
.howto-steps {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 24px;
    counter-reset: step;
}
.howto-step {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px 24px;
    position: relative;
    counter-increment: step;
}
.howto-step::before {
    content: counter(step, decimal-leading-zero);
    position: absolute;
    top: -12px;
    left: 24px;
    background: var(--gradient-primary);
    color: #fff;
    font-size: 0.8rem;
    font-weight: 800;
    padding: 4px 12px;
    border-radius: 50px;
}
.howto-step-title {
    font-size: 1rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 10px;
    margin-top: 8px;
}
.howto-step-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ============================================
   联系信息
   ============================================ */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: start;
}
.contact-info-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 36px;
}
.contact-info-title {
    font-size: 1.4rem;
    font-weight: 800;
    color: #fff;
    margin-bottom: 24px;
}
.contact-detail-list { display: flex; flex-direction: column; gap: 16px; }
.contact-detail-item {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 14px;
    background: var(--bg-card2);
    border-radius: var(--radius);
}
.contact-detail-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: rgba(232,67,106,0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
}
.contact-detail-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 2px;
}
.contact-detail-value {
    font-size: 0.95rem;
    color: var(--text-primary);
    font-weight: 500;
}

/* ============================================
   底部
   ============================================ */
.site-footer { background: #080814; border-top: 1px solid var(--border); }
.footer-main { padding: 60px 0 40px; }
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1.5fr 1.5fr;
    gap: 40px;
}
.footer-logo { width: 48px; height: 48px; border-radius: 10px; }
.footer-logo-text {
    font-size: 1.3rem;
    font-weight: 800;
    color: #fff;
    display: block;
    margin-top: 8px;
    margin-bottom: 12px;
}
.footer-desc {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.7;
    margin-bottom: 20px;
}
.social-links { display: flex; gap: 8px; flex-wrap: wrap; }
.social-btn {
    padding: 6px 14px;
    border-radius: 8px;
    font-size: 0.8rem;
    font-weight: 600;
    transition: var(--transition);
    cursor: pointer;
    border: 1px solid var(--border);
    color: var(--text-secondary);
}
.social-btn:hover { border-color: var(--primary); color: var(--primary-light); }
.footer-title {
    font-size: 1rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 16px;
}
.footer-nav ul { display: flex; flex-direction: column; gap: 8px; }
.footer-nav a {
    font-size: 0.9rem;
    color: var(--text-muted);
    transition: var(--transition);
}
.footer-nav a:hover { color: var(--primary-light); }
.contact-list { display: flex; flex-direction: column; gap: 8px; }
.contact-list li { font-size: 0.85rem; color: var(--text-muted); }
.contact-label { color: var(--text-secondary); }
.qrcode-group { display: flex; gap: 20px; }
.qrcode-item { text-align: center; }
.qrcode-item img {
    border-radius: 8px;
    border: 2px solid var(--border);
    background: #fff;
    padding: 4px;
}
.qrcode-item p { font-size: 0.8rem; color: var(--text-muted); margin-top: 6px; }
.footer-bottom {
    border-top: 1px solid var(--border);
    padding: 20px 0;
}
.footer-bottom-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
}
.copyright, .update-time {
    font-size: 0.85rem;
    color: var(--text-muted);
}
.footer-links { display: flex; gap: 16px; }
.footer-links a { font-size: 0.85rem; color: var(--text-muted); }
.footer-links a:hover { color: var(--primary-light); }

/* ============================================
   AI赋能区块
   ============================================ */
.ai-section { background: linear-gradient(135deg, rgba(124,77,255,0.05) 0%, rgba(232,67,106,0.05) 100%); }
.ai-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}
.ai-visual {
    border-radius: var(--radius-lg);
    overflow: hidden;
    position: relative;
}
.ai-visual img { width: 100%; border-radius: var(--radius-lg); }
.ai-badge {
    position: absolute;
    top: 20px;
    left: 20px;
    background: rgba(124,77,255,0.9);
    color: #fff;
    padding: 6px 16px;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 700;
    backdrop-filter: blur(4px);
}
.ai-features { display: flex; flex-direction: column; gap: 16px; }
.ai-feature-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    transition: var(--transition);
}
.ai-feature-item:hover {
    border-color: rgba(124,77,255,0.3);
    transform: translateX(4px);
}
.ai-feature-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: rgba(124,77,255,0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    flex-shrink: 0;
}
.ai-feature-title {
    font-size: 1rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 4px;
}
.ai-feature-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ============================================
   面包屑
   ============================================ */
.breadcrumb {
    padding: 12px 0;
    font-size: 0.85rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--primary-light); }
.breadcrumb .sep { color: var(--text-muted); opacity: 0.5; }
.breadcrumb .current { color: var(--text-secondary); }

/* ============================================
   内页横幅
   ============================================ */
.inner-hero {
    background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-card2) 100%);
    border-bottom: 1px solid var(--border);
    padding: 50px 0;
}
.inner-hero-title {
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    font-weight: 900;
    color: #fff;
    margin-bottom: 12px;
}
.inner-hero-desc {
    font-size: 1rem;
    color: var(--text-secondary);
    max-width: 600px;
}

/* ============================================
   搜索结果提示
   ============================================ */
#search-toast {
    position: fixed;
    top: 100px;
    left: 50%;
    transform: translateX(-50%) translateY(-20px);
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 14px 28px;
    border-radius: 50px;
    font-size: 0.95rem;
    z-index: 9999;
    opacity: 0;
    transition: var(--transition);
    box-shadow: var(--shadow-card);
    pointer-events: none;
}
#search-toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* ============================================
   响应式
   ============================================ */
@media (max-width: 1024px) {
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .ai-grid { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
    .section { padding: 50px 0; }
    .main-nav { display: none; }
    .main-nav.open {
        display: block;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(13,13,26,0.98);
        border-bottom: 1px solid var(--border);
        padding: 16px;
        z-index: 999;
    }
    .main-nav.open .nav-list { flex-direction: column; align-items: stretch; }
    .main-nav.open .nav-item a { padding: 12px 16px; }
    .nav-toggle { display: flex; }
    .header-inner { position: relative; }
    .hero-section { min-height: 450px; }
    .hero-stats { gap: 20px; }
    .footer-grid { grid-template-columns: 1fr; gap: 30px; }
    .footer-bottom-inner { flex-direction: column; text-align: center; }
    .video-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
    .expert-grid { grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); }
    .qrcode-group { justify-content: center; }
    .hero-btns { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 480px) {
    .container { padding: 0 16px; }
    .hero-title { font-size: 1.8rem; }
    .video-grid { grid-template-columns: 1fr; }
    .gallery-grid { grid-template-columns: repeat(2, 1fr); }
    .community-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ============================================
   动画
   ============================================ */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}
.fade-in { animation: fadeInUp 0.6s ease forwards; }
.fade-in-delay-1 { animation-delay: 0.1s; }
.fade-in-delay-2 { animation-delay: 0.2s; }
.fade-in-delay-3 { animation-delay: 0.3s; }

/* ============================================
   滚动条
   ============================================ */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-dark); }
::-webkit-scrollbar-thumb { background: var(--primary-dark); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--primary); }

/* ============================================
   视频播放器模态框
   ============================================ */
.video-modal {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 10000;
    background: rgba(0,0,0,0.9);
    align-items: center;
    justify-content: center;
}
.video-modal.open { display: flex; }
.video-modal-inner {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 24px;
    max-width: 800px;
    width: 90%;
    position: relative;
}
.video-modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: rgba(255,255,255,0.1);
    color: #fff;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
}
.video-modal-close:hover { background: var(--primary); }
.video-player-wrap {
    aspect-ratio: 16/9;
    background: #000;
    border-radius: var(--radius);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 1rem;
}

/* ============================================
   社区功能卡片
   ============================================ */
.community-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 16px;
}
.community-card {
    background: var(--bg-card2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px 16px;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
    color: var(--text-primary);
    display: block;
    text-decoration: none;
}
.community-card:hover {
    border-color: var(--primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
    color: var(--text-primary);
}
.community-icon { font-size: 2rem; margin-bottom: 10px; }
.community-name { font-size: 0.95rem; font-weight: 700; color: #fff; margin-bottom: 4px; }
.community-count { font-size: 0.8rem; color: var(--text-muted); }

/* ============================================
   联系我们
   ============================================ */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
}
.contact-info-card {
    background: var(--bg-card2);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px;
}
.contact-info-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
}
.contact-detail-list { display: flex; flex-direction: column; gap: 16px; }
.contact-detail-item { display: flex; align-items: flex-start; gap: 12px; }
.contact-detail-icon { font-size: 1.2rem; flex-shrink: 0; margin-top: 2px; }
.contact-detail-label { font-size: 0.8rem; color: var(--text-muted); margin-bottom: 2px; }
.contact-detail-value { font-size: 0.95rem; color: var(--text-primary); }

/* ============================================
   按钮 sm
   ============================================ */
.btn-sm {
    display: inline-block;
    padding: 6px 16px;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 600;
    transition: var(--transition);
    cursor: pointer;
    text-decoration: none;
}
.btn-sm.primary {
    background: var(--gradient-primary);
    color: #fff;
}
.btn-sm.primary:hover { opacity: 0.85; }
.btn-sm.outline {
    border: 1px solid var(--border);
    color: var(--text-secondary);
}
.btn-sm.outline:hover { border-color: var(--primary); color: var(--primary-light); }

/* ============================================
   How-to 步骤
   ============================================ */
.howto-steps {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 24px;
    counter-reset: step;
}
.howto-step {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 28px;
    position: relative;
    counter-increment: step;
    transition: var(--transition);
}
.howto-step::before {
    content: counter(step);
    position: absolute;
    top: -14px;
    left: 24px;
    background: var(--gradient-primary);
    color: #fff;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    font-weight: 800;
}
.howto-step:hover { border-color: var(--primary); transform: translateY(-4px); }
.howto-step-title { font-size: 1rem; font-weight: 700; color: #fff; margin-bottom: 10px; }
.howto-step-desc { font-size: 0.88rem; color: var(--text-secondary); line-height: 1.7; }

/* ============================================
   合作伙伴
   ============================================ */
.partner-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    justify-content: center;
}
.partner-item {
    background: var(--bg-card2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px 28px;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-secondary);
    transition: var(--transition);
}
.partner-item:hover { border-color: var(--primary); color: var(--primary-light); }

/* ============================================
   评价卡片
   ============================================ */
.review-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
}
.review-card {
    background: var(--bg-card2);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
    transition: var(--transition);
}
.review-card:hover { border-color: var(--primary); transform: translateY(-4px); }
.review-header { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.review-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--gradient-primary);
    color: #fff;
    font-size: 1.1rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.review-name { font-size: 0.95rem; font-weight: 700; color: #fff; }
.review-date { font-size: 0.8rem; color: var(--text-muted); margin-top: 2px; }
.review-stars { color: #ffd700; font-size: 1rem; margin-bottom: 10px; letter-spacing: 2px; }
.review-text { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.7; margin-bottom: 12px; }
.review-tag {
    display: inline-block;
    background: rgba(232,67,106,0.1);
    color: var(--primary-light);
    border: 1px solid rgba(232,67,106,0.2);
    padding: 3px 10px;
    border-radius: 50px;
    font-size: 0.78rem;
}

/* ============================================
   FAQ
   ============================================ */
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
    background: var(--bg-card2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
}
.faq-item:hover { border-color: var(--primary); }
.faq-question {
    padding: 20px 24px;
    font-size: 0.95rem;
    font-weight: 600;
    color: #fff;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    user-select: none;
}
.faq-arrow {
    font-size: 1.4rem;
    font-weight: 300;
    color: var(--primary-light);
    transition: var(--transition);
    flex-shrink: 0;
}
.faq-item.open .faq-arrow { transform: rotate(45deg); }
.faq-answer {
    display: none;
    padding: 0 24px 20px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.8;
    border-top: 1px solid var(--border);
}
.faq-item.open .faq-answer { display: block; }

/* ============================================
   图片画廊
   ============================================ */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}
.gallery-item {
    position: relative;
    border-radius: var(--radius);
    overflow: hidden;
    aspect-ratio: 3/4;
    cursor: pointer;
}
.gallery-item img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.gallery-item:hover img { transform: scale(1.05); }
.gallery-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.7) 0%, transparent 60%);
    display: flex;
    align-items: flex-end;
    padding: 16px;
    opacity: 0;
    transition: var(--transition);
}
.gallery-item:hover .gallery-overlay { opacity: 1; }
.gallery-label {
    color: #fff;
    font-size: 0.85rem;
    font-weight: 600;
    background: rgba(232,67,106,0.8);
    padding: 4px 12px;
    border-radius: 50px;
}

/* ============================================
   专家卡片
   ============================================ */
.expert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 24px;
}
.expert-card {
    background: var(--bg-card2);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
}
.expert-card:hover { border-color: var(--primary); transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.expert-avatar { width: 100%; height: 200px; object-fit: cover; object-position: top; }
.expert-info { padding: 20px; }
.expert-name { font-size: 1.1rem; font-weight: 700; color: #fff; margin-bottom: 4px; }
.expert-role { font-size: 0.85rem; color: var(--primary-light); margin-bottom: 10px; }
.expert-desc { font-size: 0.85rem; color: var(--text-secondary); line-height: 1.6; margin-bottom: 12px; }
.expert-awards { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 14px; }
.award-tag {
    background: rgba(124,77,255,0.1);
    color: var(--accent-light);
    border: 1px solid rgba(124,77,255,0.2);
    padding: 3px 10px;
    border-radius: 50px;
    font-size: 0.78rem;
}
.expert-btns { display: flex; gap: 8px; }

/* ============================================
   视频模态框
   ============================================ */
.video-modal-title {
    font-size: 1rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 16px;
    padding-right: 40px;
}
.video-player-wrap video { width: 100%; height: 100%; }

@media (max-width: 768px) {
    .gallery-grid { grid-template-columns: repeat(2, 1fr); }
    .contact-grid { grid-template-columns: 1fr; }
    .howto-steps { grid-template-columns: 1fr; }
    .review-grid { grid-template-columns: 1fr; }
}